As the National Strength and Conditioning Association explains, there are two parts to this: the “principle of overload” and the “principle of progression.” The principle of overload ...

Get more from your gym time by lifting for strength and advancing to harder and more advanced exercises—plus enjoy the work more as you see your strength grow.

From the first linked turns onward, telemark skiing is a journey of continuous progression. And the fact that it’s never mastered is essential to its allure. Reflecting on my own telemark journey, ...

But many runners don’t follow the principle of progression for their strength workouts. They do the same core session year after year, or always stick to a similar series of exercises in the gym.